2.9BSD - /usr/src/lib/curses/addch.c

   1: # include   "curses.ext"
   2: 
   3: /*
   4:  *	This routine adds the character to the current position
   5:  *
   6:  * @(#)addch.c	1.5 (Berkeley) 5/19/83
   7:  */
   8: waddch(win, c)
   9: reg WINDOW  *win;
  10: char        c;
  11: {
  12:     reg int     x, y;
  13:     reg WINDOW  *wp;
  14: 
  15:     x = win->_curx;
  16:     y = win->_cury;
  17: # ifdef FULLDEBUG
  18:     fprintf(outf, "ADDCH('%c') at (%d, %d)\n", c, y, x);
  19: # endif
  20:     if (y >= win->_maxy || x >= win->_maxx || y < 0 || x < 0)
  21:         return ERR;
  22:     switch (c) {
  23:       case '\t':
  24:       {
  25:         reg int     newx;
  26: 
  27:         for (newx = x + (8 - (x & 07)); x < newx; x++)
  28:             if (waddch(win, ' ') == ERR)
  29:                 return ERR;
  30:         return OK;
  31:       }
  32: 
  33:       default:
  34: # ifdef FULLDEBUG
  35:         fprintf(outf, "ADDCH: 1: y = %d, x = %d, firstch = %d, lastch = %d\n", y, x, win->_firstch[y], win->_lastch[y]);
  36: # endif
  37:         if (win->_flags & _STANDOUT)
  38:             c |= _STANDOUT;
  39:         set_ch(win, y, x, c, NULL);
  40:         for (wp = win->_nextp; wp != win; wp = wp->_nextp)
  41:             set_ch(wp, y, x, c, win);
  42:         win->_y[y][x++] = c;
  43:         if (x >= win->_maxx) {
  44:             x = 0;
  45: newline:
  46:             if (++y >= win->_maxy)
  47:                 if (win->_scroll) {
  48:                     wrefresh(win);
  49:                     scroll(win);
  50:                     --y;
  51:                 }
  52:                 else
  53:                     return ERR;
  54:         }
  55: # ifdef FULLDEBUG
  56:         fprintf(outf, "ADDCH: 2: y = %d, x = %d, firstch = %d, lastch = %d\n", y, x, win->_firstch[y], win->_lastch[y]);
  57: # endif
  58:         break;
  59:       case '\n':
  60:         wclrtoeol(win);
  61:         if (!NONL)
  62:             x = 0;
  63:         goto newline;
  64:       case '\r':
  65:         x = 0;
  66:         break;
  67:       case '\b':
  68:         if (--x < 0)
  69:             x = 0;
  70:         break;
  71:     }
  72:     win->_curx = x;
  73:     win->_cury = y;
  74:     return OK;
  75: }
  76: 
  77: /*
  78:  * set_ch:
  79:  *	Set the first and last change flags for this window.
  80:  */
  81: static
  82: set_ch(win, y, x, ch, orig)
  83: reg WINDOW  *win;
  84: int     y, x;
  85: WINDOW      *orig; {
  86: 
  87:     if (orig != NULL) {
  88:         y -= win->_begy - orig->_begy;
  89:         x -= win->_begx - orig->_begx;
  90:     }
  91:     if (y < 0 || y >= win->_maxy || x < 0 || x >= win->_maxx)
  92:         return;
  93:     if (win->_y[y][x] != ch) {
  94:         if (win->_firstch[y] == _NOCHANGE)
  95:             win->_firstch[y] = win->_lastch[y] = x;
  96:         else if (x < win->_firstch[y])
  97:             win->_firstch[y] = x;
  98:         else if (x > win->_lastch[y])
  99:             win->_lastch[y] = x;
 100:     }
 101: }

Defined functions